//引用类
import java.util.Scanner;
public class demo3
{
  public static void main (String[] args){
        //创建一个demo3_1对象a
        demo3_1 a=new demo3_1();
        Scanner number = new Scanner(System.in);
        //改变demo3_1类内对象的值
        System.out.println("请输入第一个数");
        a.sum1 =number.nextInt();
        System.out.println("请输入第二个数");
        a.sum2 =number.nextInt();
        //引用改变demo3_1类的方法
        a.suChu();
        a.jiaFa(a.sum1,a.sum2);
        a.chengFa(a.sum1,a.sum2);
        
    }
  
    
}
    

